EP1821559B1 - Appareil et méthode associé, pour fournir une gestion de sélection du réseau dans un système de radiocommunication - Google Patents

Appareil et méthode associé, pour fournir une gestion de sélection du réseau dans un système de radiocommunication Download PDF

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Publication number
EP1821559B1
EP1821559B1 EP06250819A EP06250819A EP1821559B1 EP 1821559 B1 EP1821559 B1 EP 1821559B1 EP 06250819 A EP06250819 A EP 06250819A EP 06250819 A EP06250819 A EP 06250819A EP 1821559 B1 EP1821559 B1 EP 1821559B1
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Prior art keywords
change
mobile station
time periods
communication network
indications
Prior art date
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EP06250819A
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German (de)
English (en)
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EP1821559A1 (fr
Inventor
Mark Pecan
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BlackBerry Ltd
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Research in Motion Ltd
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Application filed by Research in Motion Ltd filed Critical Research in Motion Ltd
Priority to EP06250819A priority Critical patent/EP1821559B1/fr
Priority to AT06250819T priority patent/ATE465609T1/de
Priority to DE602006013782T priority patent/DE602006013782D1/de
Priority to JP2007024873A priority patent/JP4568291B2/ja
Priority to SG200700916-0A priority patent/SG135109A1/en
Priority to SG200905448-7A priority patent/SG155220A1/en
Priority to CN200710006299A priority patent/CN100588276C/zh
Priority to CA2793724A priority patent/CA2793724A1/fr
Priority to CA2577670A priority patent/CA2577670C/fr
Priority to AU2007200552A priority patent/AU2007200552B2/en
Priority to TW096105326A priority patent/TWI344312B/zh
Priority to KR1020070015770A priority patent/KR100879589B1/ko
Priority to MX2007001988A priority patent/MX2007001988A/es
Priority to BRPI0700411-7A priority patent/BRPI0700411A/pt
Publication of EP1821559A1 publication Critical patent/EP1821559A1/fr
Application granted granted Critical
Publication of EP1821559B1 publication Critical patent/EP1821559B1/fr
Priority to JP2010143166A priority patent/JP5192516B2/ja
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria

Definitions

  • the present invention relates generally to mobile-network attachment operations by which a mobile station is attached in communication connectivity with a communication network. More particularly, the present invention relates to an apparatus, and an associated method, for selecting whether to permit attachment of a mobile station to a communication network in an environment that exhibits uncertain radio frequency characteristics.
  • Improved selection management is provided as selection is made using measurements of communication-network signal broadcasts and a quantified measure of the uncertainty of the radio frequency characteristics.
  • CDMA Code-Division, Multiple-Access
  • EVDO Evolution-Data Optimized
  • a mobile station operable in a successor-communication system is sometimes also operable in a corresponding, prior-generation communication system.
  • a mobile station operable to communicate in a communication system that provides for EVDO sometimes also is constructed to be capable of operation in a CDMA 1x communication system.
  • communications are preferred to be carried out by way of the successor-generation system, if available. If communications are available with the prior-generation communication system but not with the successor-generation system, then communications are effectuable with the prior-generation system due to the backward compatibility of the mobile station.
  • the coverage areas of the communication networks of different communication systems are regularly overlaid, or partially overlaid, upon one another.
  • a mobile station as a result, is sometimes positioned at a location within the coverage areas of two or more communication systems, permitting selection to be made of with which of the available communication systems through which to communicate. And, due to the mobility of the mobile station, the mobile station is subsequently repositionable elsewhere, such as at a location encompassed by the coverage area of the networks of a different number of communication systems.
  • a coverage area such as a cellular coverage area, is not constant, but, instead, is variable, dependent upon, e.g., radio frequency conditions. Such variation in coverage area is sometimes referred to as cell breathing.
  • US5722072 relates to a method for determining a handover for a mobile station in a multicellular communication system.
  • the method includes the steps of measuring received signal parameters received from a serving cell and a plurality of neighboring cells, comparing received signal parameters with a variable threshold value for each of the plurality of neighbor cells, measuring the amount of time, or the number of times, the received signal parameters are above the threshold value for each of the plurality of neighbor cells, and determining handover based on the measurement
  • Figure 1 illustrates a functional block diagram of a communication system in which an embodiment of the present invention is operable.
  • Figure 2 illustrates a representation of coverage areas of a set of communication systems with which a mobile station operable pursuant to an embodiment of the present invention is selectably capable of communicating.
  • Figure 3 illustrates a message sequence diagram representative of signaling generated during operation of the communication system shown in Figure 1 .
  • Figure 4 illustrates a method flow diagram listing the method of operation of an embodiment of the present invention.
  • the present invention accordingly, advantageously provides apparatus, and an associated method, for selecting whether to permit mobile-network attachment operations by which a mobile station is attached in communication connectivity with a communication network.
  • a manner is provided by which to select whether to permit attachment of a mobile station to a communication network in an environment that exhibits uncertain radio frequency characteristics.
  • improved selection management is provided as selection is made using measurements of communication-network signal broadcasts and a quantified measure of the uncertainty of the radio frequency characteristics.
  • selection of a communication system in the presence of high uncertainty of radio frequency characteristics is managed. Radio frequency measurements are accumulated, and the degree of uncertainty of the radio frequency characteristics is quantified. Then, a decision threshold is created based upon the quantified uncertainty characteristics.
  • the mobile station monitors broadcasts of signals generated by a potential target cell site, or other network-station that broadcasts signals.
  • the signals are of values that permit determination of a signal performance metric.
  • the signals form a signal performance metric identifier that identifies a signal performance metric.
  • the signal performance metric is representative of a radio frequency characteristic associated with communication conditions of the communication channel upon which the signals are broadcast.
  • the signals are operated upon, for instance, to obtain the signal performance metric.
  • the signal performance metric forms, for instance, a signal strength indication, such as an RSSI value, a bit error rate (BER) value, a bit error probability (BEP) value, a carrier-to-interference (C/I) value, or any other desired performance metric value or calculation that provides an indication of the radio frequency characteristics of the communication of the signals broadcast by the communication system.
  • a signal strength indication such as an RSSI value, a bit error rate (BER) value, a bit error probability (BEP) value, a carrier-to-interference (C/I) value, or any other desired performance metric value or calculation that provides an indication of the radio frequency characteristics of the communication of the signals broadcast by the communication system.
  • the signals are monitored, for instance, during a selected number of time periods, thereby permitting accumulation of measurements of the radio frequency characteristics.
  • rates of change of the signal performance metric are also calculated. Calculations are made, for instance, by determining differences between the values of the signal performance metric at successive time periods during which the signals are monitored. The differences between the values at the successive time periods define a delta, i.e., change between the measured values. By performing a limit operation as the time period approaches zero, the difference calculations form first derivatives of the measurements. The rates of change of the measured values are alternately calculated in other manners.
  • the values that are accumulated over a plurality of time periods are averaged together to form an average value of the measurements over the plurality of time periods.
  • the average value is, for instance, an arithmetic mean or a weighted average.
  • the measured values and rates of change thereof are analyzed to select whether to authorize connection of a mobile station to the communication system from which the monitored signals are broadcast.
  • the authorization is granted only if the measured values are of selected characteristics.
  • the values must, for instance, exhibit an average value that is at least as great as a selected threshold.
  • the rates of change of the measured values during each of the time periods must be beyond a selected level, e.g., all of the rates of change must be positive values.
  • the authorization is granted only if the average value is beyond the selected threshold and all of the rates of change are positive.
  • a mobile station is operable in both a CDMA 1x and an EVDO communication system. If the mobile station is initially connected to the CDMA 1x system, the mobile station monitors for broadcasts of other systems, such as a CDMA system that provides EVDO. When a signal broadcast by a CDMA/EVDO communication system is detected, the signal is monitored over successive time periods. Averages are made of the measured values during successive time periods, and rates of change of the values are calculated. If the average value is at least as great as a selected value and the rates of change are all positive, then authorization is granted for the mobile station to switch to the EVDO system, that is, authorization is granted to permit the mobile station to become connected in communication connectivity with the CDMA/EVDO system.
  • a manner of managing the selection of the communication system is provided even in the presence of high uncertainty of radio frequency characteristics. As the uncertainty characteristics are quantified, a better informed selection is made.
  • apparatus, and an associated method for a mobile station.
  • the mobile station is selectably connectable in communication connectivity with a communication network.
  • a signal performance metric identifier is adapted to receive an indication of a receive signal transmitted by the communication network during at least a first time period.
  • a rate of change calculator is adapted to receive a representation of the indication received by the signal performance metric identifier.
  • the rate of change calculator is configured to calculate a rate of change of the representation.
  • a connector authorizer is adapted to receive an indication of calculations made by the rate of change calculator.
  • the connector authorizer is configured selectably to authorize connection of the mobile station to the communication network responsive to the rate of change being beyond a selected threshold.
  • a mobile station 10 is operable to connect in communication connectivity with a selected communication system, of which portions of the networks of two communication systems, system 12 and system 14, are represented in the figure.
  • the mobile station forms a CDMA-capable device operable pursuant to the operating protocol set forth in a CDMA 1x communication system and a CDMA/EVDO communication system.
  • the communication system 12 is representative of a CDMA 1x communication system
  • the communication system 14 is representative of a CDMA/EVDO communication system.
  • the mobile station 10 is representative of any of various cellular, and other, communication station operable to communicate in a radio communication system
  • the communication systems 12 and 14 are representative of any corresponding set of communication systems with which the station 10 is capable of communication. While the following description shall describe exemplary operation with respect to the exemplary implementation of the mobile station as a CDMA-capable mobile station, it should be understood that the teachings of the present invention are analogously applicable to mobile stations operable pursuant to other operating protocols, connectable to communication networks of other types of communication systems.
  • the mobile station includes transceiver circuitry, here represented by a transmit part 16 and a receive part 18.
  • the transmit and receive parts operate to transmit and to receive, respectively, communication signals with a communication system, such as the systems 12 and 14, with which the mobile station is in communication connectivity.
  • communications with an EVDO-capable system are generally preferred over communications in a communication system that provides only for communications conforming to CDMA 1x protocols.
  • communications with the CDMA 1x system are preferred. That is to say, with respect to the illustration of Figure 1 , when the mobile station 10 is positioned in the coverage areas of both the systems 12 and 14, attachment of the mobile station in communication connectivity with the EVDO system 14 is preferred over communications with the CDMA 1x system 12.
  • the mobile station 10 includes apparatus, shown generally at 24, of an embodiment of the present invention.
  • the apparatus manages uncertainty in system selection, thereby to improve the selection process by which to select whether to permit the mobile station to become attached to, in communication connectivity, a cellular system, such as the EVDO system 14 shown in Figure 1 .
  • the apparatus is functionally represented, implementable in any desired manner including, for instance, algorithms executable by processing circuitry.
  • the apparatus 24 is, in the exemplary implementation, embodied at the mobile station 10, in other implementations, elements of the apparatus are embodied elsewhere, e.g., at a network portion of the communication system or distributed between the network portion and the mobile station. While the uncertainty of the radio frequency characteristics cannot be altered, a manner is provided, through operation of an embodiment of the present invention, by which to manage better the uncertainty, thereby to facilitate better selection of whether to permit attachment of the mobile station to a communication system.
  • the apparatus includes a signal performance metric identifier 28 that is provided, here by way of the line, 32 with indications of signals received at the mobile station.
  • the signals of interest comprise, e.g., control signals broadcast by the communication systems.
  • the signals are monitored, in conventional manner, during operation of the mobile station, such as by tuning to code-division channels associated with the networks of the communication systems.
  • the signal performance metric identifier identifies a performance metric associated with the received signal.
  • the performance metric forms an RSSI (Receive Signal Strength Indication) of the receive signal, a receive signal quality indication derived, e.g., from a bit error probability (BEP), a carrier-to-interference (C/I) ratio, or other communication performance indicia.
  • the signal performance metric identifier identifies a value of the performance metric repeatedly during successive time intervals and accumulates the values, such as at a buffer or other storage element (not separately shown).
  • the values identified or formed by the identifier are provided to an average calculator 34.
  • the average calculator calculates average values, over a selected number of time periods, to form an average value therefrom.
  • the average value forms an arithmetic average.
  • the average value is a weighted average.
  • weighting information is provided by way of the line 36 to weight, for instance, certain of the values that are being averaged theretogether.
  • the average value, once calculated, is provided to a connector authorizer 38.
  • the values of the performance metric identified by the identifier are also provided to a change rate calculator 42.
  • the change rate calculator calculates the rates of change of the values.
  • the rates of change define the first derivatives of the values.
  • the rates of change are calculated by forming differences between the values measured at the successive time periods. Once calculated, the rates of change are provided to the connector authorizer 38.
  • the connector authorizer selects whether to permit the mobile station to become attached to the communication system responsive to the values provided thereto by the average calculator and the change rate calculator. In various implementations, the authorization is further dependent upon other criteria, including conventional criteria. Authorizations provided by the authorizer are provided to the transceiver circuitry, and the transmit and receive parts 16 and 18 are caused to be operated in manners to carry out the authorization provided by the connector authorizer.
  • the connector authorizer authorizes attachment of the mobile station to the communication system when the average value is beyond a selected threshold and the rates of change are positive.
  • N measurements are accumulated at fixed intervals.
  • the measurements permit metrics of radio frequency performance to be identified of signals received at the mobile station, here of a neighboring system, the system 14.
  • the window(s) of measurements are processed. First, an arithmetic or weighted average of measurements is computed. Then, the first derivative of each measurement is computed.
  • Authorization to connect with the system is permitted only if the computed average is greater than or equal to a threshold level and also the first derivative of the measurements within the sliding window, less the first measurement is positive. This ensures that the uncertainty level with respect to the radio frequency characteristics has diminished to a degree where a relatively high likelihood exists that the mobile station shall be able to remain attached in communication connectivity to the communication system.
  • a selection parameter of an alternate system, S is represented as follows:
  • Figure 2 illustrates a representation, shown generally at 52, of exemplary coverage areas of the networks of the communication systems 12 and 14, shown in Figure 1 .
  • the coverage areas partially overlap.
  • the cell-breathing effect, evident most significantly at the boundaries of the coverage areas are shown, represented by the dashed lines and solid lines, and the differences 54 therebetween.
  • An exemplary path of travel of the mobile station is represented by the line 56.
  • the mobile station is in the area of solid coverage of the network of the CDMA 1x system 12.
  • the mobile station is attached to the system 12 when so-positioned.
  • the mobile station travels into the area 58 at the boundary area of the network of the EVDO system 14.
  • Radio frequency characteristics thereat are uncertain as a result, e.g., of fading channel conditions, user mobility, and instantaneous cell breathing.
  • the mobile station is unable fully to synchronize itself with the EVDO system and, in the absence of operation of an embodiment of the present invention, falls back to attachment to the system 12 repeatedly, thereby causing incomplete access to information communicated during operation of the system 12.
  • the mobile station enters into the solid coverage area of the system 14.
  • the mobile station attaches to the system 12 as little uncertainty regards the appropriateness of the radio frequency characteristics of communication conditions in the system 14.
  • the mobile station does not attempt to become attached to the system 14 when the mobile station is positioned at the area 58.
  • the performance metrics do not exhibit the required average values or exhibit positive rates of change, required to permit attachment of the mobile station to the EVDO system.
  • the performance metric changes, and the attachment of the mobile station to the system 14 is permitted.
  • Figure 3 illustrates a sequence representation 62 of operation of the mobile station 10.
  • the mobile station is attached in communication connectivity, indicated by the block 64, with the communication system 12.
  • the mobile station monitors signals broadcast by the communication system 14.
  • Signal performance metrics are identified by measurement of the signals broadcast by the system 14 during a plurality of time periods.
  • Performance metrics of the signal are identified, here indicated by the block 68 values of which are averaged and rates of change thereof are calculated, indicated by the blocks 72 and 74. If both the rates of change are positive and the average values are greater than a selected threshold, authorization is granted, indicated by the block 76 for the mobile station to become attached to the communication system 14. And, the mobile station becomes attached, indicated by the block 76, with the system 14.
  • Figure 4 illustrates a method flow diagram, shown generally at 82, representative of the method of operation of an embodiment of the present invention.
  • the method is for selectably authorizing connection of a mobile station to a communication network.
  • a plurality of radio link measurements are accumulated at selected time intervals. Then, and as indicated by the block 86, the plurality of radio link measurements are processed.
  • connection to the communication network is authorized if the measurements achieve selected criteria.

Claims (13)

  1. Appareil (24) destiné à une station mobile (10), pouvant être sélectivement connecté par une connectivité de communication avec un réseau de communication, ledit appareil (24) comprenant :
    un identificateur de métrique de performances du signal (28), conçu pour recevoir une indication d'un signal reçu qui a été émis par le réseau de communication pendant au moins une première période de temps ;
    un calculateur de vitesse de changement (42), conçu pour recevoir une représentation de l'indication reçue par ledit identificateur de métrique de performances du signal (28), ledit calculateur de vitesse de changement (42) étant configuré pour calculer une vitesse de changement de la représentation ;
    un calculateur de moyenne (34), conçu pour recevoir des valeurs représentatives des indications reçues par ledit identificateur de métrique de performances du signal (28), une pondération respective étant attribuée à chacune desdites indications et ledit calculateur de moyenne (34) étant configuré pour calculer une valeur moyenne pondérée des indications reçues par ledit identificateur de métrique de performances du signal (28) ; et
    un moyen d'autorisation de connexion (38), conçu pour recevoir une indication des calculs effectués par ledit calculateur de vitesse de changement (42) et ledit calculateur de moyenne (34), ledit moyen d'autorisation de connexion (38) étant configuré pour autoriser sélectivement la connexion de la station mobile (10) au réseau de communication suivant que la vitesse de changement dépasse un seuil sélectionné et que la valeur moyenne pondérée dépasse un niveau sélectionné.
  2. Appareil (24) selon la revendication 1, dans lequel l'indication reçue par ledit identificateur de métrique de performances du signal (28) comprend des indications du signal reçu qui a été émis par le réseau de communication pendant une pluralité de périodes de temps.
  3. Appareil (24) selon la revendication 2, dans lequel les indications comprennent une indication du signal reçu pour chaque période parmi la pluralité de périodes de temps.
  4. Appareil (24) selon la revendication 3, dans lequel la pluralité de périodes de temps comprend des périodes de temps successives et dans lequel la valeur moyenne calculée par ledit calculateur de moyenne (34) est fondée sur des indications reçues par ledit identificateur de métrique de performances du signal (28) pendant un nombre sélectionné de périodes de temps sur la pluralité de périodes de temps.
  5. Appareil (24) selon la revendication 3, dans lequel la valeur moyenne calculée par ledit calculateur de moyenne (34) est constituée d'une moyenne arithmétique.
  6. Appareil (24) selon la revendication 2, dans lequel ledit calculateur de vitesse de changement (42) est en outre conçu pour calculer la vitesse de changement pour chaque indication reçue par ledit identificateur de métrique de performances du signal (28) pendant un nombre sélectionné de périodes de temps sur la pluralité de périodes de temps.
  7. Appareil (24) selon la revendication 6, dans lequel la vitesse de changement calculée par ledit calculateur de vitesse de changement (42) est calculée en déterminant des différences entre les valeurs des indications reçues par ledit identificateur de métrique de performances du signal (28) sur des périodes successives dans le nombre sélectionné de périodes de temps parmi la pluralité de périodes de temps.
  8. Appareil (24) selon la revendication 6, dans lequel le seuil sélectionné est constitué d'une valeur positive et dans lequel le niveau sélectionné au-delà duquel doit se situer la valeur moyenne exigée par ledit moyen d'autorisation de connexion (38) pour autoriser la connexion au réseau de communication est constitué au moins d'un niveau minimal.
  9. Appareil (24) selon la revendication 1, dans lequel le seuil sélectionné au-delà duquel doit se situer la vitesse de changement exigée par ledit moyen d'autorisation de connexion (38) pour autoriser la connexion de la station mobile (10) avec le réseau de communication est constituée d'une valeur positive.
  10. Appareil (24) selon la revendication 1, dans lequel l'indication du signal reçu, que ledit identificateur de métrique de performances du signal (28) est conçu pour recevoir, comprend un indice de qualité du signal.
  11. Procédé (82) destiné à autoriser sélectivement la connexion d'une station mobile (10) à un réseau de communication, ledit procédé comprenant les étapes consistant à :
    recevoir des indications d'un signal reçu qui a été émis par le réseau de communication pendant au moins une première période de temps ;
    calculer des vitesses de changement des représentations des indications reçues pendant ladite étape de réception ;
    calculer une valeur moyenne pondérée des indications reçues dans ladite étape de réception, une pondération respective étant attribuée à chacune desdites indications ; et
    autoriser la connexion de la station mobile au réseau de communication suivant que la vitesse de changement dépasse un seuil sélectionné et que la valeur moyenne pondérée dépasse un niveau sélectionné.
  12. Procédé (82) selon la revendication 11, dans lequel les indications du signal reçu sont constituées de mesures de qualité du signal.
  13. Procédé (82) selon la revendication 11, dans lequel l'étape d'autorisation de la connexion de la station mobile au réseau de communication se fait en réponse au fait que les vitesses de changement sont des vitesses positives de changement.
EP06250819A 2006-02-16 2006-02-16 Appareil et méthode associé, pour fournir une gestion de sélection du réseau dans un système de radiocommunication Active EP1821559B1 (fr)

Priority Applications (15)

Application Number Priority Date Filing Date Title
EP06250819A EP1821559B1 (fr) 2006-02-16 2006-02-16 Appareil et méthode associé, pour fournir une gestion de sélection du réseau dans un système de radiocommunication
AT06250819T ATE465609T1 (de) 2006-02-16 2006-02-16 Gerät und verfahren zur bereitstellung von netzauswahlverwaltung in einem funkkommunikationssystem
DE602006013782T DE602006013782D1 (de) 2006-02-16 2006-02-16 Gerät und Verfahren zur Bereitstellung von Netzauswahlverwaltung in einem Funkkommunikationssystem
JP2007024873A JP4568291B2 (ja) 2006-02-16 2007-02-02 無線通信システムにおけるネットワーク選択管理を提供する装置および関連方法
SG200905448-7A SG155220A1 (en) 2006-02-16 2007-02-06 Apparatus, and associated method, for providing network selection management in a radio communication system
SG200700916-0A SG135109A1 (en) 2006-02-16 2007-02-06 Apparatus, and associated method, for providing network selection management in a radio communication system
CA2577670A CA2577670C (fr) 2006-02-16 2007-02-07 Appareil et methode connexe de gestion des selections de reseau dans un systeme de radiocommunication
CA2793724A CA2793724A1 (fr) 2006-02-16 2007-02-07 Appareil et methode connexe de gestion des selections de reseau dans un systeme de radiocommunication
CN200710006299A CN100588276C (zh) 2006-02-16 2007-02-07 用于在无线通信系统中提供网络选择管理的装置和相关方法
AU2007200552A AU2007200552B2 (en) 2006-02-16 2007-02-08 Apparatus, and associated method, for providing network selection management in a radio communication system
TW096105326A TWI344312B (en) 2006-02-16 2007-02-13 Apparatus, and associated method, for providing network selection management in a radio communication system
MX2007001988A MX2007001988A (es) 2006-02-16 2007-02-15 Aparato, y metodo asociado, para proporcionar una administrcion de selecciona de red en un sistema de comunicacion de radio.
KR1020070015770A KR100879589B1 (ko) 2006-02-16 2007-02-15 무선 통신 시스템에서 네트워크 선택 관리를 제공하는 장치및 관련 방법
BRPI0700411-7A BRPI0700411A (pt) 2006-02-16 2007-02-15 aparelho e método associado, para fornecer gerenciamento de seleção de rede em um sistema de comunicação de rádio
JP2010143166A JP5192516B2 (ja) 2006-02-16 2010-06-23 無線通信システムにおけるネットワーク選択管理を提供する装置および関連方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06250819A EP1821559B1 (fr) 2006-02-16 2006-02-16 Appareil et méthode associé, pour fournir une gestion de sélection du réseau dans un système de radiocommunication

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EP1821559A1 EP1821559A1 (fr) 2007-08-22
EP1821559B1 true EP1821559B1 (fr) 2010-04-21

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EP (1) EP1821559B1 (fr)
JP (2) JP4568291B2 (fr)
KR (1) KR100879589B1 (fr)
CN (1) CN100588276C (fr)
AT (1) ATE465609T1 (fr)
AU (1) AU2007200552B2 (fr)
BR (1) BRPI0700411A (fr)
CA (2) CA2577670C (fr)
DE (1) DE602006013782D1 (fr)
MX (1) MX2007001988A (fr)
SG (2) SG155220A1 (fr)
TW (1) TWI344312B (fr)

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CA2145044A1 (fr) * 1994-03-21 1995-09-22 Paul Crichton Methode pour determiner l'instant de changement de voie dans un systeme multicellulaire
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ATE465609T1 (de) 2010-05-15
DE602006013782D1 (de) 2010-06-02
JP5192516B2 (ja) 2013-05-08
AU2007200552B2 (en) 2009-03-05
JP4568291B2 (ja) 2010-10-27
CA2577670A1 (fr) 2007-08-16
MX2007001988A (es) 2008-11-18
BRPI0700411A (pt) 2007-11-06
CA2577670C (fr) 2013-02-12
TWI344312B (en) 2011-06-21
CN101026794A (zh) 2007-08-29
JP2007221781A (ja) 2007-08-30
KR100879589B1 (ko) 2009-01-30
CN100588276C (zh) 2010-02-03
CA2793724A1 (fr) 2007-08-16
TW200742469A (en) 2007-11-01
AU2007200552A1 (en) 2007-09-06
EP1821559A1 (fr) 2007-08-22
SG155220A1 (en) 2009-09-30
KR20070082548A (ko) 2007-08-21
JP2010268487A (ja) 2010-11-25

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